NFS mount hangs

[Chis (Ian Chisholm)]

This hit one of my clusters recently (Fedora core 3). 
/etc/init.d/iptables stop on the CLIENT  then a remount worked fine. 

Obviously a workaround not a solution but one I'm happy with at the
moment, given the topography of my cluster!

Cheers
 
Chis
 
Ian Chisholm
UNIX and Network Security Manager
0131 451 3535

-----Original Message-----
From: redhat-list-bounces at redhat.com
[mailto:redhat-list-bounces at redhat.com] On Behalf Of Ray Van Dolson
Sent: 21 August 2006 22:26
To: General Red Hat Linux discussion list
Subject: Re: NFS mount hangs

On Mon, Aug 21, 2006 at 05:19:13PM -0400, Norman Elton wrote:
> 99% of the time, this works flawlessly. There are times; however, that

> the mount process hangs. After upgrading the client RHEL systems to 
> the latest kernel, its happened twice. In both cases, I can mount some

> NFS directories, while others hang. Even if I try to mount them 
> manually, outside the context of the automounter, nothing happens.
> Meanwhile, other directories on the same client work fine.

Hmm... could be a bug on the OSX server as well?  On the client, if you
do an strace -p on the mount process, what do you see (when it's locked
up).
Or maybe it's deadlocked waiting for some sort of IO?

Just brainstorming here, but maybe you could leave a tcpdump running and
catch this when it happens and see what part of the negotiation
succeeded and what part failed... perhaps help isolate whether the
client or server is to blame.

Ray

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